CN113279776B - Large-section rectangular jacking pipe inclined blind hole receiving and disassembling method - Google Patents
Large-section rectangular jacking pipe inclined blind hole receiving and disassembling method Download PDFInfo
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- CN113279776B CN113279776B CN202110810666.3A CN202110810666A CN113279776B CN 113279776 B CN113279776 B CN 113279776B CN 202110810666 A CN202110810666 A CN 202110810666A CN 113279776 B CN113279776 B CN 113279776B
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000002689 soil Substances 0.000 claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 210000000038 chest Anatomy 0.000 claims description 19
- 230000003014 reinforcing effect Effects 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 210000000481 breast Anatomy 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 238000010276 construction Methods 0.000 claims description 13
- 230000001788 irregular Effects 0.000 claims description 8
- 239000011150 reinforced concrete Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
- E21D9/1006—Making by using boring or cutting machines with rotary cutting tools
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
- E21D9/1006—Making by using boring or cutting machines with rotary cutting tools
- E21D9/1013—Making by using boring or cutting machines with rotary cutting tools on a tool-carrier supported by a movable boom
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- General Life Sciences & Earth Sciences (AREA)
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- Lining And Supports For Tunnels (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a receiving and disassembling method for a large-section rectangular jacking pipe inclined blind hole, which comprises the following steps of: s1, designing a built-in telescopic brim according to an interface of a cutter head of the rectangular pipe jacking machine and a side wall of an entrance and exit of a subway station, placing the built-in telescopic brim in a shell of the rectangular pipe jacking machine, manufacturing the rectangular pipe jacking machine according to the built-in telescopic brim, and then descending a well to start jacking; s2, jacking the rectangular pipe jacking machine to a preset position according to a design axis and stopping the machine; s3, after the rectangular pipe jacking machine is jacked in place, a jack pipeline is connected, a piston rod of the jack extends out, the piston rod drives a jack pushing stop block to move forwards, and the jack pushing stop block drives a built-in telescopic brim to slowly eject out until the front end of the brim is contacted with a side wall enclosure structure of an entrance and exit of a subway station; s4, completing disassembly of the rectangular pipe jacking machine in a space where the rectangular pipe jacking machine shell and the built-in telescopic brim are supported, and leaving the pipe jacking machine shell and the built-in telescopic brim in a soil layer to serve as a primary support structure of an access connection channel.
Description
Technical Field
The invention relates to the technical field of pipe jacking construction, in particular to a receiving and disassembling method for an oblique blind hole of a large-section rectangular pipe jacking.
Background
With the acceleration of the urbanization process, rail transit becomes one of important means for solving urban traffic congestion, subway construction is continuously promoted in each big city, mechanized construction gradually becomes the mainstream of a subway construction method, and especially in recent years, construction at subway entrances and exits by adopting a rectangular pipe jacking method becomes a new hot spot.
At present, subways are usually built in busy urban areas, particularly, station stations are mostly located at intersections of roads, construction of subway station entrances and exits is often delayed from construction of a station main body due to restriction of external factors such as land acquisition and removal, the operation of the subways is delayed, when the entrances and exits are constructed by a pipe jacking method, a pipe jacking machine cannot adopt a normal shaft receiving method, can only receive disintegration in a hole by a blind hole, and further reduces influence on operation of the opened subway stations as much as possible. Because the jacking pipe originating working well and the axis of the jacking pipe have irregular oblique crossing in the horizontal or vertical direction, the horizontal or vertical angle is 0-90 degrees, when the rectangular jacking pipe machine jacks into the side wall of the receiving end, the cutter head of the rectangular jacking pipe machine cannot be in front contact with the side wall of the receiving end, only one angular point touches the side wall of the receiving end, a wedge-shaped soil body with a certain thickness is formed between the side wall of the receiving end and the cutter head of the rectangular jacking pipe machine, if the wedge-shaped soil body is not reinforced, when the rectangular jacking pipe machine is subjected to blind hole receiving disintegration, the soil body is very easy to collapse, and further the operation safety of an existing subway operation station and an access is influenced.
For example, patent application No. 202010019058.6 discloses a method for constructing a subway station entrance/exit channel by using rectangular jacking pipes, patent application nos. 201811626615, X, 201811229692.1 and 201410352567.5 all introduce rectangular jacking pipe machine receiving methods, but all adopt a vertical shaft receiving method by arranging a working well at a receiving end, and patent application No. 201910443104.2 discloses a receiving method for a subway station entrance/exit channel in construction operation of a rectangular jacking pipe machine.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a receiving and disassembling method for a large-section rectangular jacking pipe inclined blind hole, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides a receiving and disassembling method for a large-section rectangular jacking pipe inclined blind hole, which comprises the following steps of:
s1, designing a built-in telescopic brim according to an interface of a cutter head of the rectangular pipe jacking machine and a side wall of an entrance and exit of a subway station, placing the built-in telescopic brim in a shell of the rectangular pipe jacking machine, manufacturing the rectangular pipe jacking machine according to the built-in telescopic brim, and then descending a well to start jacking;
s2, jacking the rectangular pipe jacking machine to a preset position according to a design axis and stopping the machine;
s3, after the rectangular pipe jacking machine is jacked in place, a jack pipeline is connected, a piston rod of the jack extends out, the piston rod drives a jack pushing stop block to move forwards, the jack pushing stop block drives a built-in telescopic brim to slowly eject out until the front end of the brim is contacted with a side wall enclosure structure of an entrance and exit of a subway station, and the jack is locked after the rectangular pipe jacking machine is jacked in place;
and S4, completing the disassembly of the rectangular pipe jacking machine in the space supported by the rectangular pipe jacking machine shell and the built-in telescopic brim, and leaving the pipe jacking machine shell and the built-in telescopic brim in the soil layer as a primary support structure of the access connection channel.
In a preferred embodiment, the method further comprises the following steps: arranging a pipe joint tensioning device at the end of 10 built pipe joints nearest to the head of the rectangular pipe jacking machine, and dismantling a spiral soil discharging machine, a deviation rectifying system and a power system in the rectangular pipe jacking machine; opening a reserved advanced grouting hole of the rectangular pipe jacking machine shell, and reinforcing soil bodies on the upper part and the left side and the right side of the outer side of the built-in telescopic brim; after soil bodies on the upper part and the left side and the right side of the outer side of the built-in telescopic brim are solidified to set strength, holes are formed in the side wall of the entrance and exit of the subway station at the joint of the built-in telescopic brim, irregular wedge-shaped soil bodies between the rectangular pipe push bench and the side wall of the entrance and exit of the subway station are manually excavated under the support of the built-in telescopic brim, a cutter disc of the rectangular pipe push bench is exposed, then a breast board is cut and detached, and the cutter disc of the rectangular pipe push bench and a jack are taken out.
In a preferred embodiment, the method further comprises the following steps: arranging a pipe joint tensioning device at the end of 10 built pipe joints nearest to the head of the rectangular pipe jacking machine, and dismantling a spiral soil discharging machine, a deviation rectifying system and a power system in the rectangular pipe jacking machine; opening a reserved advanced grouting hole of the rectangular pipe jacking machine shell, and reinforcing soil bodies on the upper part and the left side and the right side of the outer side of the built-in telescopic brim; after soil bodies on the upper portion and the left side and the right side of the outer side of the built-in telescopic brim are solidified to set strength, the breast board is cut, the cutter disc and the jack of the rectangular pipe push bench are taken out, then irregular wedge-shaped soil bodies between the rectangular pipe push bench and the side wall of the entrance and exit of the subway station are manually excavated under the support of the built-in telescopic brim, and the built-in telescopic brim is supported while the wedge-shaped soil bodies are excavated.
In a preferred embodiment, the method further comprises the following steps: and constructing a two-lining reinforced concrete structure in the rectangular pipe jacking machine shell and the built-in telescopic brim, and connecting the two-lining reinforced concrete structure with the side wall of the subway station entrance and exit to finally form a subway entrance and exit channel.
In a preferred embodiment, the built-in telescopic brim is in an inverted U shape and is made of a steel plate with the thickness of 2cm, the built-in telescopic brim is arranged between the pipe jacking machine shell and the breast board, the front end of the brim is obliquely arranged and is attached to the side wall of the subway station entrance and exit, and the rear end of the brim extends to the rear end of the pipe jacking machine shell.
In a preferred embodiment, the front end and the rear end of the joint of the built-in telescopic brim and the pipe jacking machine shell are respectively provided with a sliding seal arranged along the whole length of the built-in telescopic brim, and the joint of the rear end of the brim and the breast board is provided with a sliding seal.
In a preferred embodiment, cylindrical chest plate jack cylinder grooves are molded in the top and two sides of the chest plate and in the middle of adjacent rectangular pipe jacking machine cutterheads, the chest plate jack cylinder grooves are used for placing jacks, the jacks are used for pushing the built-in telescopic hats, sliding seals are arranged at the joint of the chest plate jack cylinder grooves, which are close to the tail ends of the jacks, and the bottom of the chest plate jack cylinder grooves, which is close to the tail ends of the jacks, is provided with screw aligning joints, and the screw aligning joints are connected with jack oil pipes.
In a preferred embodiment, a plurality of jack pushing stop blocks are welded on the inner side of the built-in telescopic hat brim, a steel plate at the front end of the hat brim is cut into a sharp angle of 30 degrees, a plurality of hat brim reinforcing ribs with different lengths are welded on two sides of the corresponding position of the built-in telescopic hat brim and a breast board jack groove, each hat brim reinforcing rib is made of a steel plate with the thickness of 2cm, the front end of each hat brim reinforcing rib is 5cm away from the front end of the hat brim, and the rear end of each hat brim reinforcing rib is 5cm away from the breast board.
In a preferred embodiment, the jack pushing block comprises an octahedron, an intermediate baffle and a groove for receiving a jack piston rod at the tail part, wherein the octahedron is made of a 1cm steel plate, the intermediate baffle is made of a 2cm steel plate, one side of the intermediate baffle is welded with the octahedron, the other side of the intermediate baffle is welded with a ring body, and the ring body is inserted into the jack piston rod.
In a preferred embodiment, the intermediate baffle comprises a trapezoidal side and a semicircular end, wherein the trapezoidal side is welded with the built-in telescopic brim, and the radius of the semicircular end is greater than 2cm of the groove.
Compared with the prior art, the invention has the beneficial effects that: the oblique blind hole receiving and disassembling method for the large-section rectangular push pipe solves the problem that no receiving well is obliquely received and disassembled in the rectangular push pipe construction of the subway station entrance and exit in the existing opening operation, and the problem that no receiving well is obliquely received and disassembled in the existing subway station entrance and exit rectangular push pipe construction is guaranteed by arranging the built-in telescopic brim in the rectangular push pipe machine shell, when the rectangular push pipe machine is pushed in place, the outer extending brim supports soil between the rectangular push pipe machine and the wall structure of the existing subway station entrance and exit, prevents the wedge-shaped soil from collapsing after the rectangular push pipe machine is irregularly pushed in place in an oblique manner, solves the problem that no receiving well is obliquely received and disassembled in the rectangular push pipe construction of the subway station entrance and exit in the existing opening operation, and guarantees the operation safety of the existing operation station and entrance and exit.
Drawings
FIG. 1 is a flow chart of a receiving and disassembling method for a large-section rectangular jacking pipe inclined blind hole according to a preferred embodiment of the invention.
FIG. 2 is a top view of the rectangular push bench in the top-to-position built-in retractable visor in a retracted state according to the preferred embodiment of the invention.
FIG. 3 is a side view of the rectangular push bench in a retracted state with the built-in retractable visor in a top-to-position state according to the preferred embodiment of the invention.
FIG. 4 is a top view of the extended state of the built-in telescopic visor of the rectangular push bench in the jacking position according to the preferred embodiment of the invention.
FIG. 5 is a side elevation view of the extended state of the built-in telescopic visor of the rectangular push bench in the jacking position according to the preferred embodiment of the invention.
Fig. 6 is a schematic cross-sectional view of soil body reinforcement according to a preferred embodiment of the present invention.
Fig. 7 is a horizontal sectional view of a subway station doorway channel in accordance with a preferred embodiment of the present invention.
Fig. 8 is a longitudinal sectional view of a subway station doorway channel in accordance with a preferred embodiment of the present invention.
Fig. 9 is a front view of the built-in retractable visor of the preferred embodiment of the present invention.
Fig. 10 is a rear view of the built-in retractable visor of the preferred embodiment of the present invention.
Fig. 11 is a schematic structural view of a jacking stop block of the jack according to a preferred embodiment of the present invention.
Description of reference numerals:
1-built-in telescopic hat brim, 2-rectangular pipe jacking machine, 21-rectangular pipe jacking machine shell, 3-jack, 31-piston rod, 32-jack cylinder body, 33-jack oil pipe, 4-jack jacking stop dog, 41-octahedron, 42-middle baffle, 43-groove, 5-subway station entrance and exit side wall enclosure structure, 7-sliding seal, 8-rectangular pipe jacking machine cutter head, 9-breast plate, 91-breast plate jack cylinder groove, 10-reinforced soil body, 11-subway station entrance and exit, 12-entrance and exit originating well, 13-wedge-shaped soil body, 14-entrance and exit channel, 15-ground, 16-diagonal joint, 17-hat brim reinforced rib plate, 18-cutter head drive and 19-spiral front inserting cylinder.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below. The embodiments of the present invention, and all other embodiments obtained by a person of ordinary skill in the art without any inventive work, belong to the scope of protection of the present invention.
As shown in fig. 1 to 11, the receiving and disassembling method for the oblique blind hole of the large-section rectangular jacking pipe in the preferred embodiment of the invention comprises the following steps:
s1, designing a built-in telescopic brim according to the interface of a cutter head of the rectangular push bench and a side wall of an entrance and exit of a subway station, placing the built-in telescopic brim 1 in a shell 21 of the rectangular push bench, manufacturing a rectangular push bench 2 according to the built-in telescopic brim, and then starting jacking after going down a well.
And S2, jacking the rectangular push bench to a preset position according to a design axis, and stopping the push bench.
And S3, after the rectangular push bench is pushed in place, a jack pipeline is connected, a piston rod 31 of the jack 3 extends out, the piston rod 31 is used for driving a jack pushing stop block 4 to move forwards, the jack pushing stop block 4 drives a built-in telescopic brim 1 to be slowly pushed out until the front end of the brim is contacted with a subway station entrance and exit side wall enclosure 5, an irregular wedge-shaped soil body 13 between the rectangular push bench and the subway station entrance and exit side wall enclosure is supported, and the jack is locked after the rectangular push bench is pushed in place, so that the built-in telescopic brim 1 is prevented from retreating. Specifically, a hydraulic lock is arranged at the inlet of a hydraulic pipeline of the jack, hydraulic oil in the jack is locked through the hydraulic lock, the piston rod 31 of the jack is prevented from retracting, and the built-in telescopic brim connected with the jack is further prevented from retracting.
And step S4, completing the disassembly of the rectangular pipe jacking machine in the space supported by the rectangular pipe jacking machine shell and the built-in telescopic brim 1, and leaving the pipe jacking machine shell 21 and the built-in telescopic brim 1 in the soil layer as a primary support structure of the access channel 14.
Further, the method for receiving and disassembling the large-section rectangular jacking pipe by the inclined blind hole further comprises the following steps: and (3) arranging a pipe joint tensioning device at the end of the 10 sections of constructed pipe joints closest to the head of the rectangular pipe jacking machine, and dismantling the spiral soil discharging machine, the deviation rectifying system and the power system in the rectangular pipe jacking machine. Then, as shown in fig. 6, opening a reserved advanced grouting hole (not shown in the figure) of the push bench shell, and reinforcing soil on the upper part and the left and right sides of the outer side of the built-in telescopic brim to form a reinforced soil 10, wherein the advanced grouting hole is a plurality of radial holes arranged on the rectangular push bench shell, the radial holes are arranged along the left and right sides and the upper periphery of the rear end shell at intervals of 60cm, the push bench is arranged in the radial holes to avoid internal components of the push bench, and if a structural member is met, the position of the radial hole is finely adjusted. After the soil mass on the upper part and the left and right sides of the outer side of the built-in telescopic brim 1 is solidified to set strength, two construction processes can be adopted. Specifically, one of them is: the method comprises the steps of forming holes in side walls of an entrance and an exit of a subway station at the joint of a rectangular pipe jacking machine, manually excavating irregular wedge-shaped soil bodies between the rectangular pipe jacking machine and the side walls of the entrance and the exit of the subway station under the support of an internal telescopic brim 1 to expose a cutter disc 8 of the rectangular pipe jacking machine, cutting and dismantling a chest plate 9, and taking out the cutter disc 8 of the rectangular pipe jacking machine and a jack 3. The other is as follows: after soil bodies on the upper part and the left side and the right side of the outer side of the built-in telescopic brim 1 are solidified to set strength, a breast board is cut, a cutter disc 8 of the rectangular pipe push bench and a jack 3 are taken out, then under the support of the built-in telescopic brim 1, irregular wedge-shaped soil bodies 13 between the rectangular pipe push bench and the side walls of the entrance and exit of the subway station are manually excavated, and the built-in telescopic brim is supported while excavating the wedge-shaped soil bodies 13.
Further, the method for receiving and disassembling the large-section rectangular jacking pipe inclined blind hole 13 further comprises the following steps: two lining reinforced concrete structures are constructed in the rectangular pipe jacking machine shell 21 and the built-in telescopic brim 1 and are connected with the side wall of the subway station entrance, and finally, a subway entrance and exit channel 14 is formed.
As shown in figures 9-10, the built-in telescopic brim 1 of the invention is in an inverted U shape and is made of a steel plate with the thickness of 2cm, the built-in telescopic brim 1 is arranged between a pipe jacking machine shell 21 and a breast board 9, the front end of the brim is obliquely arranged and is attached to the side wall of an entrance and exit of a subway station, and the rear end of the brim extends to the rear end of the pipe jacking machine shell.
Furthermore, the front end and the rear end of the joint of the built-in telescopic brim 1 and the pipe jacking machine shell 21 are respectively provided with a sliding seal 7 arranged along the whole length of the built-in telescopic brim, and the joint of the rear end of the brim and the breast board 9 is provided with the sliding seal 7. Cylindrical chest plate jack cylinder grooves 91 are molded in the top and two sides of the chest plate 9 and in the middle of adjacent rectangular pipe jacking machine cutterheads 8, the chest plate jack cylinder grooves 91 are used for placing jacks 3, the jacks 3 are used for pushing the built-in telescopic hats 1, sliding seals 7 are arranged at the positions, close to the tail end sides of the jacks, of the chest plate jack cylinder grooves 91 and connected with the built-in telescopic hats 1, screw-aligning joints 16 are arranged at the positions, close to the bottoms of the tail ends of the jacks, of the chest plate jack cylinder grooves 91, and the screw-aligning joints 16 are connected with jack oil pipes 33. The rectangular pipe jacking machine cutter head 8 is connected with a cutter head drive 18 through a flange plate, and the cutter head drive 18 is connected with a breast board 9.
Furthermore, a plurality of jack pushing stop blocks 4 are welded on the inner side of the built-in telescopic brim 1, and a steel plate at the front end of the brim is cut into a sharp angle of 30 degrees so as to reduce the extending resistance of the brim. A plurality of hat brim reinforcing rib plates 17 with different lengths are welded on two sides of the corresponding position of the built-in telescopic hat brim 1 and the breast board jack cylinder groove 91, each hat brim reinforcing rib plate 17 is made of a steel plate with the thickness of 2cm, the front end of each hat brim reinforcing rib plate 17 is 5cm away from the front end of the hat brim, and the rear end of each hat brim reinforcing rib plate 17 is 5cm away from the breast board.
As shown in fig. 11, the jack catch block includes an octahedron 41, an intermediate baffle 42 and a groove 43 for receiving the jack piston rod at the tail. Wherein, octahedron 41 is formed by 1cm steel sheet preparation, and middle baffle 42 is made by 2cm steel sheet, and middle baffle 42 one side and octahedron 41 welded connection, the other side welding has the tourus, inserts in the tourus piston rod. The middle baffle 42 comprises a trapezoidal side and a semicircular end, wherein the trapezoidal side is connected with the built-in telescopic brim 1 in a welding mode, and the radius of the semicircular end is larger than that of the groove 2 cm.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A receiving and disassembling method for a large-section rectangular jacking pipe inclined blind hole is characterized by comprising the following steps of: the method comprises the following steps:
s1, designing a built-in telescopic brim according to an interface of a cutter head of a rectangular pipe jacking machine and a side wall of an entrance and exit of a subway station, placing the built-in telescopic brim in a shell of the rectangular pipe jacking machine, manufacturing the rectangular pipe jacking machine according to the built-in telescopic brim, and then starting to jack down;
s2, jacking the rectangular pipe jacking machine to a preset position according to a design axis and stopping the machine;
s3, after the rectangular pipe jacking machine is jacked in place, a jack pipeline is connected, a piston rod of the jack extends out, the piston rod drives a jack pushing stop block to move forwards, the jack pushing stop block drives the built-in telescopic brim to slowly eject out until the front end of the brim is contacted with a side wall enclosure structure of an entrance and exit of a subway station, and the jack is locked after the rectangular pipe jacking machine is jacked in place;
s4, completing the disassembly of the rectangular pipe jacking machine in the space supported by the rectangular pipe jacking machine shell and the built-in telescopic brim, and leaving the rectangular pipe jacking machine shell and the built-in telescopic brim in the soil layer as a primary support structure of an access connection channel;
also comprises the following steps:
arranging a pipe joint tensioning device at the end of 10 built pipe joints nearest to the head of the rectangular pipe jacking machine, and dismantling a spiral soil discharging machine, a deviation rectifying system and a power system in the rectangular pipe jacking machine; opening a reserved advanced grouting hole of the rectangular pipe jacking machine shell, and reinforcing soil bodies on the upper part and the left side and the right side of the outer side of the built-in telescopic brim; after the soil body on the upper part and the left and right sides of the outer side of the built-in telescopic brim is solidified to set strength, construction is carried out according to one of the following modes:
the first method is as follows: a hole is formed in the side wall of the entrance and exit of the subway station at the joint of the rectangular pipe jacking machine, irregular wedge-shaped soil between the rectangular pipe jacking machine and the side wall of the entrance and exit of the subway station is manually excavated under the support of the built-in telescopic brim, a cutter disc of the rectangular pipe jacking machine is exposed, then a chest plate is cut and removed, and the cutter disc of the rectangular pipe jacking machine and a jack are taken out;
the second method comprises the following steps: cutting a breast board, taking out a cutter disc and a jack of the rectangular pipe jacking machine, manually excavating irregular wedge-shaped soil between the rectangular pipe jacking machine and the side wall of the entrance and exit of the subway station under the support of the built-in telescopic brim, and supporting the built-in telescopic brim while excavating the wedge-shaped soil;
the built-in telescopic brim is in an inverted U shape and is arranged between the shell of the push pipe machine and the breast board.
2. The large-section rectangular jacking pipe oblique blind hole receiving and disassembling method according to claim 1, characterized in that: also comprises the following steps: and constructing a two-lining reinforced concrete structure in the rectangular pipe jacking machine shell and the built-in telescopic brim, and connecting the two-lining reinforced concrete structure with the side wall of the subway station entrance and exit to finally form a subway entrance and exit channel.
3. The large-section rectangular jacking pipe oblique blind hole receiving and disassembling method according to claim 2, characterized in that: the built-in telescopic hat brim is made of a steel plate with the thickness of 2cm, the front end of the hat brim is obliquely arranged and is attached to the side wall of the entrance and exit of the subway station, and the rear end of the hat brim extends to the rear end of the shell of the pipe jacking machine.
4. The large-section rectangular jacking pipe oblique blind hole receiving and disassembling method according to claim 3, characterized in that: the front end and the rear end of the joint of the built-in telescopic brim and the pipe jacking machine shell are respectively provided with a sliding seal arranged along the whole length of the built-in telescopic brim, and the joint of the rear end of the brim and the breast board is provided with a sliding seal.
5. The large-section rectangular jacking pipe oblique blind hole receiving and disassembling method according to claim 4, characterized in that: the chest plate has the chest plate jack cylinder groove of cylinder at top and both sides position, adjacent rectangle pipe pushing jack blade disc mid portion mould system, chest plate jack cylinder groove is used for placing the jack, the jack is used for pushing away built-in flexible brim of a hat, just the nearly jack tail end side in chest plate jack cylinder groove with built-in flexible brim of a hat department of meeting is equipped with sliding seal, the nearly jack tail end bottom in chest plate jack cylinder groove is equipped with to the silk joint, to the silk joint and jack oil union coupling.
6. The large-section rectangular jacking pipe oblique blind hole receiving and disassembling method according to claim 5, characterized in that: the novel helmet visor is characterized in that a plurality of jack pushing stop blocks are welded on the inner side of the built-in telescopic helmet visor, a steel plate at the front end of the helmet visor is cut into a sharp angle of 30 degrees, a plurality of helmet visor reinforcing rib plates with different lengths are welded on two sides of the corresponding position of the built-in telescopic helmet visor and a chest plate jack cylinder groove, each helmet visor reinforcing rib plate is made of a steel plate with the thickness of 2cm, the distance from the front end of the helmet visor reinforcing rib plate to the front end of the helmet visor is 5cm, and the distance from the rear end of the helmet visor reinforcing rib plate to the chest plate is 5 cm.
7. The large-section rectangular jacking pipe oblique blind hole receiving and disassembling method according to claim 6, characterized in that: jack top pushing block includes that octahedron, intermediate baffle and afterbody accept the recess of jack piston rod, wherein, the octahedron is formed by the preparation of 1cm steel sheet, intermediate baffle is made by the 2cm steel sheet, intermediate baffle one side with octahedron welded connection, the opposite side welding has the tourus, insert in the jack piston rod in the tourus.
8. The large-section rectangular jacking pipe oblique blind hole receiving and disassembling method according to claim 7, characterized in that: the middle baffle comprises a trapezoidal side and a semicircular end, wherein the trapezoidal side is connected with the built-in telescopic brim in a welding mode, and the radius of the semicircular end is larger than that of the groove by 2 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110810666.3A CN113279776B (en) | 2021-07-19 | 2021-07-19 | Large-section rectangular jacking pipe inclined blind hole receiving and disassembling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110810666.3A CN113279776B (en) | 2021-07-19 | 2021-07-19 | Large-section rectangular jacking pipe inclined blind hole receiving and disassembling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113279776A CN113279776A (en) | 2021-08-20 |
| CN113279776B true CN113279776B (en) | 2021-10-26 |
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| JP2005030041A (en) * | 2003-07-11 | 2005-02-03 | Ohbayashi Corp | Tunnel construction system and jacking pipe |
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| CN104088646B (en) * | 2014-04-11 | 2016-02-24 | 中国水利水电第十一工程局有限公司 | A kind of construction method of shape of a hoof open type shield machine |
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